react-dapp-requirements/src/utils.js

(https://github.com/centrifuge/react-dapp-requirements)

export const promisify = (inner) => {
  return new Promise((resolve, reject) => {
    inner((error, result) => {
      if (error) {
        reject(error);
      }
      resolve(result);
    });
  });
};

export const promiseWithTimeout = (millis, promise) => {
  const timeout = new Promise((resolve, reject) =>
    setTimeout(() => reject(`promise.timeout`), millis)
  );
  return Promise.race([promise, timeout]);
};

export const centeredStyle = {
  height: '100vh',
  display: 'flex',
  flexDirection: 'column',
  alignItems: 'center',
  justifyContent: 'center'
};